I have ducks, chickens, and 1 turkey all living together peacefully... With the ducks in the mix you'll want your water source outside of the coop though. They WILL with out a doubt, make a mess inside the coop if the water is inside. My turkey was raised with the chicks so she's just always been a REALLY big chicken - they don't care that she makes different noises and is a giant compared to everybody else
Adding birds shouldn't be a problem unless you don't have the space for them. They will find their place on the totem pole and order will be restored once everybody is used to the newbies

Adding birds shouldn't be a problem unless you don't have the space for them. They will find their place on the totem pole and order will be restored once everybody is used to the newbies
